CODEWITHSUNDEEP
firebasetestingpluginsfirebase-authenticationflutter
Eduardo Yamauchi
Eduardo Yamauchi

Reputation: 849

How can I access the Firebase Flutter plugin from a test?

I want to run the real Firebase (not a mock) during a Flutter test. I'm trying to authenticate Firebase with FirebaseOptions:

import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import "package:test/test.dart";

Future<void> main() async {
  final FirebaseApp app = await FirebaseApp.configure(
    name: 'test',
    options: const FirebaseOptions(
      googleAppID: 'xxxxxxx',
      projectID: 'yyyyyy',
    ),
  );
  final Firestore firestore = Firestore(app: app);
  await firestore.settings(timestampsInSnapshotsEnabled: true);

  test('Testing access.', () async {
    final FirebaseAuth _auth = FirebaseAuth.instance;
    FirebaseUser user = await _auth.signInAnonymously();

    firestore.collection('aaaaa').document('bbbbb').get().then((documentSnaphot) {
      expect(documentSnaphot['xxxx'], 'ccccc');
    });
  });
}

However, I'm getting the following error:

Failed to load "C:\Users\Ed\testing\app\test\user_test.dart": 
MissingPluginException(No implementation found for method 
FirebaseApp#appNamed on channel plugins.flutter.io/firebase_core)


package:flutter/src/services/platform_channel.dart 278:7                                                    
MethodChannel.invokeMethod

===== asynchronous gap ===========================

c: 38:53                                                                                                    
FirebaseApp.appNamed

===== asynchronous gap ===========================

c: 64:55                                                                                                    
FirebaseApp.configure

===== asynchronous gap ===========================

test\usuario_test.dart 7:45                                                                                 
main

===== asynchronous gap ===========================

package:test                                                                                                
serializeSuite

..\..\..\AppData\Local\Temp\flutter_test_listener.64a30b51-eb69-11e8-
a427-1831bf4c06e8\listener.dart 19:27  main

How can I solve this?

Upvotes: 3

Views: 2417

Answers (2)

ShehanAmarakoon
ShehanAmarakoon

Reputation: 34

This will check the current firebase user null or not. Still I'm writing the tests. Will update a test for signInAnonymously if possible. 

test('API current Firebase user', () async {
      MethodChannel channel = MethodChannel(
        'plugins.flutter.io/firebase_auth',
      );
      channel.setMockMethodCallHandler((MethodCall call) async {
        if (call.method == 'currentUser') {
          return ;
        }
        ;
        throw MissingPluginException();
      });

      FirebaseUser user = await FirebaseAuth.instance.currentUser();
      expect(user, null);
    });

Upvotes: 0

G&#252;nter Z&#246;chbauer
G&#252;nter Z&#246;chbauer

Reputation: 657871

Plugins run only on mobile devices (or emulators).
To make testing code that uses plugins possible, you can register your own handlers that respond to method channel requests like the native side of plugins would

test('gets greeting from platform', () async {
  const channel = MethodChannel('foo');
  channel.setMockMethodCallHandler((MethodCall call) async {
    if (call.method == 'bar')
      return 'Hello, ${call.arguments}';
    throw MissingPluginException();
  });
  expect(await hello('world'), 'Platform says: Hello, world');
});

From the last section of https://medium.com/flutter-io/flutter-platform-channels-ce7f540a104e

Upvotes: 3

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